Phonograph having a casket-like casing



Dec. 8, 1925- 1.564.640

K. STILLE PHONOGRAPH HAVING A CASKET LI KE CASING Filed April 5. 1922 Kai-l jii/la (BM/J M Patented Dec. 8, 19.25,

FATS

KURT STILLE, OF BERLIN-ZEI'ILENDORF, GERMANY.

PHONOGR-APl-I HAVING A CASKET-LIKE CASING.

Application filed April 3, 1922.

like a casket or small cabinet and which encloses the mechanical parts, record disc,

and sound conduit or horn, including the mouth of the horn.

One of the objects of my invention is to construct a phonograph of the type above mentioned. and having a casing of the type above mentioned which shall be free from enclosed spaces of any substantial size, so as to obviate the sound distortion produced by resoname as much as possible. Such spaces in phonographs enclosed. in a casing cause a. weakening of the strength of the sound and a change of the timbre.

In order to avoid these undesirable ef fects the casing of the phmiograph is ac cording to the present invention constructed in such. a manner that the walls of the easing are not imperforate but have a large number of openings, like a lattice or grat ing. The dead hollow spaces which produce the undesirable resonai'u-e effects are avoided, particularly between the casing and the walls of the sound conduit or horn and thereby the source of disturbance which Serial No. 545,917.

produces a change of the strength of sound 49 and of the timbre is removed.

In the accompanying drawing one embodiment of the invention is shown by way of example in connection with a talking machine having the shape of a casket.

Fig. 1 is a perspective view of the apparatus, and

Fig. 2 is a horizontal section through the outer casing.

As it may be seen from the drawing, the end walls 1 and the front wall. 2 of the casing are constructed with openings 3 so that they are formed like a grate or lattice. Hence there are no closed spaces between the sound conduit or horn and these eX terior walls so that the vibrations of the walls of. the horn or sound conduit are directly and freely transmitted to the outside. This is because said perforated walls are not only in front of the horn, but also at the sides thereof, since the casing completely encloses the horn as before mentioned. The inner side of these walls may be lined. with coloured and transparent fabrics in order to improve their outer appearance.

I claim as my invention A phonograph having all the parts. thereof, including the movable parts, the tone arm and the amplifier, enclosed in a single casing having a substantially unperforated top and, the said casing being sufficiently perforated throughout the rest thereof to substantially obviate any reaction between the various sounds produced, and the walls of the said casing.

In testimony whereof I have signed my name to this specification.

KURT STILLE. 

